Classifications

A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS

A62D5/00—Composition of materials for coverings or clothing affording protection against harmful chemical agents

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]

Y10T428/249978—Voids specified as micro

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]

Y10T428/249981—Plural void-containing components

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]

Y10T428/249987—With nonvoid component of specified composition

Y10T428/249991—Synthetic resin or natural rubbers

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]

Y10T428/249987—With nonvoid component of specified composition

Y10T428/249991—Synthetic resin or natural rubbers

Y10T428/249992—Linear or thermoplastic

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC

Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T428/00—Stock material or miscellaneous articles

Y10T428/31504—Composite [nonstructural laminate]

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC

Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T428/00—Stock material or miscellaneous articles

Y10T428/31504—Composite [nonstructural laminate]

Y10T428/31725—Of polyamide

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC

Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T428/00—Stock material or miscellaneous articles

Y10T428/31504—Composite [nonstructural laminate]

Y10T428/31971—Of carbohydrate

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer

Y10T442/2508—Coating or impregnation absorbs chemical material other than water

Y10T442/2516—Chemical material is one used in biological or chemical warfare

Abstract

The invention relates to an adsorption material (1) with a protective action against chemical toxins, in particular chemical weapons. Said material has a multi-ply layered structure (2), the latter (2) comprising at least one support layer (3), in particular a flat support layer and an interlining (4) that is applied to the support layer (3) and that prevents or at least delays the penetration of chemical toxins. The interlining (4) comprises at least one adsorption layer (5) based on an adsorbent, in particular an active charcoal-based adsorbent, which adsorbs a chemical toxin and at least one essentially water- and air-tight, but water-vapour permeable membrane (6), which delays the penetration of chemical toxins or is at least essentially impermeable to said toxins. The adsorption material (1) is extremely comfortable to wear, having in particular good breathability, whilst guaranteeing excellent protection against chemical toxins.

Description

Protective clothing with ABC protection

The present invention relates to a breathable adsorbent material with a protective function against chemical poisons, in particular chemical warfare agents, with improved wearing comfort, in particular for the production of protective materials, such as protective suits, protective gloves, protective shoes, protective covers (e.g. for patient transportation) and the like, in particular for ABC use, as well as its use in the aforementioned protective materials.

There are a number of substances that are absorbed by the skin and cause serious physical damage. Examples include the blistering mustard (yellow cross) and the nerve poison sarin. People who can come into contact with such poisons must wear a suitable protective suit or be protected against these poisons by suitable protective materials.

There are basically three types of protective suits: the air and water vapor impermeable protective suits, which are equipped with a rubber layer impermeable to chemical poisons and very quickly lead to heat build-up, the air and water vapor permeable protective suits which offer the highest wearing comfort , and finally protective suits that are equipped with a membrane that allows water vapor to pass through, but not the poisons mentioned.

ABC protective clothing is therefore traditionally made either from completely impermeable systems (eg suits made from butyl rubber) or permeable, adsorptive filter systems based on activated carbon (powder, fibrous materials or spherical carbon).

Protective suits against chemical warfare agents that are intended for prolonged use under a wide variety of conditions must not lead to heat build-up on the wearer. Therefore, air-permeable materials are mainly used.

The air-permeable, permeable protective suits generally have an adsorption layer with activated carbon, which the chemical poisons are very persistent. binds securely, so that even heavily contaminated suits pose no danger to the wearer. The great advantage of this system is that the activated carbon is also accessible from the inside, so that poisons that have penetrated into damage or other leaks are adsorbed very quickly. Under extreme conditions, for example when a drop of a thickened poison appears from a greater height on a slightly open area of the outer material and penetrates to the point of coal, the layer of coal can be temporarily overwhelmed locally.

The adsorption layer in the air-permeable, permeable protective suits described above is in most cases designed such that either up to approximately 1.0 mm large activated carbon particles are bound to adhesive piles printed on a carrier or that a reticulated PU foam that is impregnated with a "carbon paste" (ie binder and activated carbon), is used as the adsorption layer, the adsorption layer generally being supplemented by an "outer material" (ie a covering material) and covered on the inside facing the carrier by a light textile material Occasionally, however, composites are also found which contain an activated carbon sheet, for example an activated carbon fleece.

Protective suits are also used, which are equipped with a membrane which is designed to be permeable to water vapor to increase comfort, but at the same time acts as a barrier layer against liquids, in particular toxins. Such a material is described for example in EP 0 827 451 A2. Protective suits with a membrane which is permeable to water vapor but impermeable to poisons, in particular skin poisons, have the disadvantage that poisons which have penetrated at leaky points remain inside the protective suit and are absorbed by the skin of the wearer.

It is now the object of the present invention to provide an adsorption or. To provide protective material which at least partially avoids the disadvantages described above and is particularly suitable for the production of NBC protective materials, such as protective suits, protective gloves, protective shoes, protective covers and the like. Another object of the present invention is to provide an adsorption material, in particular for use in protective materials, such as, for example, protective suits, protective gloves, protective shoes, protective covers and the like, which - in addition to being permeable to water vapor, the passage, in particular, of chemical warfare agents and toxins (e.g. Membrane toxins) at least strongly retarding or preventing membrane - contains an adsorption layer based on activated carbon. A certain weight saving of the adsorption material is also sought.

Another object of the present invention is to provide an adsorption material, in particular for use in protective materials, such as protective suits, protective gloves, protective shoes, protective covers and the like, which ensures high wearing comfort.

To solve the above-mentioned problem, the present invention proposes an adsorption material according to claim 1. Further advantageous refinements of the adsorption material according to the invention are the subject of the respective subclaims or the secondary claims.

The present invention furthermore relates to the use of the adsorption material according to the invention for the production of protective materials, in particular protective suits, protective gloves, protective shoes, protective covers (for example, for patient transport) and the like, preferably for use in ABC.

Finally, a further subject of the present invention are protective materials, such as protective suits, protective gloves, protective shoes, protective covers (eg for patient transportation), protective suits and the like, in particular for ABC use, which are produced with the adsorption material according to the invention.

Further advantages, properties, aspects and features of the present invention result from the following description of a preferred exemplary embodiment shown in the drawing. It shows: 1 shows a schematic sectional illustration through the layer structure of a breathable adsorption material according to a preferred embodiment of the invention in accordance with a special embodiment.

The only FIG. Shows a schematic sectional illustration through the layer structure 2 of an adsorption material 1 according to the invention in accordance with a special embodiment. The breathable adsorption material 1 according to the invention, which is equipped with a protective function against chemical poisons, in particular chemical warfare agents, has a multilayered layer structure 2, the layer structure 2 being at least QJΏ.Q, in particular a flat carrier layer 3 and one associated with the carrier layer 3 has barrier layer 4 preventing or at least delaying the passage of chemical poisons; The barrier layer 4 in turn comprises on the one hand at least one adsorption layer 5 based on a chemical adsorbing adsorbent, in particular based on activated carbon, and on the other hand at least one at least essentially water and air impermeable but water vapor permeable, delaying the passage of chemical poisons or at least in comparison to chemical poisons essential impermeable membrane 6.

The basic idea of the present invention is to equip a breathable adsorption material 1 with a multilayer structure 2 with an increased or improved protective function against chemical poisons, in particular chemical warfare agents, in that the barrier layer 4 contains both at least one adsorption layer 5 and at least one membrane 6 which is at least essentially water and air impermeable but water vapor permeable, retards the passage of chemical poisons or is at least essentially impermeable to chemical poisons.

The aforementioned membrane 6, which are arranged, for example, between the support layer 3 and the adsorption layer 5, causes chemical poisons, such as e.g. B. chemical warfare agents, can not penetrate further into the material and that these poisons, for. B. when the membrane 6 is arranged between the carrier layer 3 and the adsorption layer 5, the adsorption layer 5 does not or does not at least for the most part not at all, so that the adsorption capacity of the adsorption layer 5 remains virtually inexhaustible. On the other hand, the presence of the membrane 6 provides additional protection for the carrier of the adsorption material 1, so that an adsorption material 1 with a double protective function against chemical poisons results, so to speak (namely on the one hand by the barrier action of the membrane 6 and on the other hand by the adsorption action of the Adsorption layer 5). By equipping the adsorption material 1 according to the invention with a special breathable membrane 6, which delays the passage of chemical poisons or is at least essentially impermeable to chemical poisons, good decontamination and regenerability of the adsorption material 1 according to the invention is achieved at the same time. This is because poisons which may have penetrated through the outer or carrier layer 3 and are located on the membrane 6 can be removed again from the membrane 6 by appropriate treatment methods (for example by flushing them down, for example using suitable decontamination solutions which reduce the Are well known to those skilled in the art for these purposes).

According to the invention, the barrier layer 4 of the adsorption material 1 according to the invention thus comprises both an adsorption layer 5 and a membrane 6 with the aforementioned properties. The combination of adsorption layer 5, on the one hand, and membrane 6, on the other hand, in accordance with the layer structure 2 according to the invention, ensures efficient protection against chemical poisons, in particular chemical warfare agents, while at the same time being highly comfortable, in particular breathability.

In the state of use of the adsorption material 1 according to the invention, the carrier layer 3 is advantageously arranged on the outside, in particular facing a pollutant source which releases chemical poisons. Consequently, the barrier layer 4, based on the carrier layer 3, is advantageously arranged on the inside, in particular facing away from a pollutant source which releases chemical poisons. Furthermore, it can be provided that the adsorption material 1 also has at least one in particular flat covering layer 7 assigned to the adsorption layer 5. The cover layer 7 can in particular for Cover the barrier layer 4, in particular the Adsoφtionsschicht 5, serve. The cover layer 7 can in particular help to prevent excessive mechanical stress on the barrier layer 4, in particular the adsorption layer 5. If necessary, the cover layer 7 can simultaneously serve as a carrier for the adsorbent of the adsorption layer 5 and / or for the membrane 6. In particular, the cover layer 7 can be part of the barrier layer 4.

Furthermore, it can be provided that the adsorption material 1 also has at least one additional, in particular flat additional covering layer 8, the additional covering layer 8 preferably being arranged on the inside when the adsorption material 1 is in use, in particular facing away from a source of chemical toxins which releases toxins, ie. H. So the carrier layer 3 is arranged opposite. The additional covering layer 8 and the carrier layer 3 can in particular form the two outer layers 3, 8 of the adsorption material 1, the additional covering layer 8 advantageously forming an inner lining when the adsorption material 1 is in use.

The individual layers 3, 4, 5, 6, 7, 8 of the layer structure 2 can each be connected to one another; this is done using methods known per se for these purposes (e.g. by gluing, welding, sewing, deepening, etc.). Advantageously, the connection or fixing of the individual layers 3, 4, 5, 6, 7, 8 of the layer structure 2 takes place seamlessly with one another, preferably without damaging the individual layers 3, 4, 5, 6, 7, 8 (e.g. by gluing, welding, etc.). In the event that the layers 3, 4, 5, 6, 7, 8 - at least partially - are sewn or the like, it is advisable to seal the seams (e.g. with a so-called seam sealing tape). In particular, the individual layers 3, 4, 5, 6, 7, 8 of the layer structure 2 form a coherent composite.

Alternatively, the individual layers 3, 4, 5, 6, 7, 8 of the layer structure 2 can also be present, at least in part, unconnected, for. B. be placed loosely one above the other. The individual layers 3, 4, 5, 6, 7, 8 of the layer structure 2 can be arranged in the Adsoφtionsmaterial 1 as follows, wherein the individual layers 3, 4, 5, 6, 7, 8 can be connected to each other, what with Symbol "+" is reproduced, or can lie unconnected one above the other, which is represented by the symbol "/".

, (3) + (6) + (7) + (5) + (8)

• (3) + (6) / (7) + (5) + (8). (3) / (6) + (5) + (8)

• (3) / (6) + (7) + (5) + (8) • (3) + (6) + (5) + (7) / (8)

, (3) + (6) / (5) + (8)

, (3) + (6) + (5) + (8)

, (3) / (6) + (5) + (7) / (8)

• (3) / (6) + (5) / (8) • (3) + (6) / (7) + (5) / (8)

, (3) + (6) / (7) + (5) + (7) / (8).

In the state of use of the adsorption material 1, the carrier layer 3 is generally arranged on the outside, in particular facing a source of chemical toxins and the additional cover layer 8 is arranged on the inside, in particular facing away a source of chemical toxins.

As far as the cover layer 7 and / or the additional cover layer 8 is concerned, the cover layer 7 and / or the additional cover layer 8 can be used for stabilization and / or. Protection of the adsorption layer 5 and / or the membrane 6 serve. The cover layer 7 and / or the additional cover layer 8 can be designed as a preferably air-permeable textile material, in particular a flat textile structure, such as a woven fabric, knitted fabric, knitted fabric, scrim or textile composite. The covering layer 7 and or the additional covering layer 8 preferably have a lower basis weight than the carrier layer 3. In particular, the covering layer 7 has a basis weight of 5 to 75 g / m 2 , in particular 10 to 50 g / m 2 , preferably 15 to 30 g / m 2 , preferably less than 60 g / m 2 , in particular less than 50 g / m 2 , preferably less than 40 g / m 2 . The too Additional carrier layer 8 has in particular a basis weight of 5 to 150 g / m, in particular 20 to 125 g / m, preferably 30 to 100 g / m, preferably 40 to 90 g / m 2 . Depending on the design of the Adsoφtionsmaterials 1, z. B. the membrane 6 on the cover layer 7 and / or on the additional cover layer 8 laminated or laminated, for. B. by means of a preferably discontinuous, in particular dot-applied adhesive and / or by means of a hot melt adhesive fabric ("hot melt adhesive web"). Advantageously, the cover layer 7 and or additional cover layer 8 can be designed to be abrasion-resistant and, in particular, to consist of an abrasion-resistant textile material.

With regard to the material of the carrier layer 3, which generally forms the outer layer of the adsorption material 1 in the use or wearing state, any desired, in particular breathable, materials can be used here. Examples taerfür are textile materials of all kinds, preferably air-permeable textile materials, especially in the form of textile fabrics, such. B. fabrics, knitted fabrics, knitted fabrics, scrims or textile composites. For example, the textile composite can be a nonwoven.

In order to prevent or make it more difficult for chemical poisons (for example concentrated drops of warfare agents) to penetrate, it is recommended that the material of the carrier layer 3 be oleophobicized and / or hydrophobicized, in particular by means of a special impregnation.

The material of the carrier layer 3 generally has a basis weight of 50 to 300 g / m 2 , in particular 75 to 250 g / m 2 , preferably 90 to 175 g / m 2 . In particular, the backing layer 3 is designed as an air-permeable, 75 to 250 g / m, preferably 90 to 175 g / m heavy textile fabric which can be made oleophobic and / or hydrophobic.

As far as the membrane 6 is concerned, this is generally a continuous, in particular closed or at most microporous membrane. The thickness of the membrane 6 is generally 1 to 500 μm, in particular 1 to 250 μm, preferably 1 to 100 μm, preferably 1 to 50 μm, particularly preferably from 2.5 to 30 μm, very particularly preferably 5 to 25 μm. To increase comfort, especially respiratory activity, the membrane 6 has a high water vapor permeability of at least 12.5 1 / m per 24 h, in particular at least 17.5 1 / m 2 ro 24 h, preferably at least 20 1 / at 25 ° C. and with a thickness of 50 μm m 2 per 24 h or more, to (measured according to the "inverted cup method" or "inverted cup method" according to ASTM E 96 and at 25 ° C) (For further details on the measurement of water vapor permeability [water va- pour transmission, WVT] see also McCullough et al. "A comparison of standard methods for measuring water vapor permeability of fabrics" in Meas. Sei. Technol. [Measurements Science and Technology] 14, 1402-1408, August 2003). This ensures a particularly high level of comfort.

Due to the large number of layers 2, 3, 4, 5, 6, 7 and 8 of the layer structure 2, the water vapor permeability of the adsorption material 1 as a whole is slightly lower compared to the membrane 6 alone; the water vapor permeability of the adsorption material 1 overall is nevertheless very high and is at least 101 / m 2 per 24 h, in particular at least 151 / m 2 per 24 h, preferably at least 20 1 / m 2 per 24 h, with a thickness of the membrane 6 of 50 μm (at 25 ° C).

For reasons of breathability, the membrane 6 should have a low water vapor resistance R et under stationary conditions - measured according to DIN EN 31 092: 1993 from February 1994 ("Textiles - Physiological effects, measurement of the heat and water vapor resistance under stationary conditions [sweating guarded-hotplate test] ") or according to the international standard ISO 11 092 - at 35 ° C of at most 30 (m 2 • Pascal) / watt, in particular at most 25 (m 2 • Pascal) / watt, preferably at most 20 (m 2 • Pascal) / Watt, with a thickness of the membrane 6 of 50 μm. Due to the large number of layers 2, 3, 4, 5, 6, 7 and 8 of the layer structure 2, the water vapor volume resistance R et of the adsorption material 1 as a whole - compared to the membrane 6 alone - is slightly higher; in general, the water vapor volume resistance R et of the adsorption material 1 is at most 30 (m 2 • Pascal) / watt, in particular at most 25 (m 2 • Pascal) / watt, preferably at most 20 (m 2 • Pascal) / watt, at one Thickness of the membrane 6 of 50 microns.

The membrane 6 should otherwise be only slightly water-absorbent or swellable; a low water absorption capacity or Swellability increases comfort. In particular, the swellability or the water absorption capacity of the membrane 6 should be at most 35%, in particular at most 25%, preferably at most 20%, based on the weight of the membrane 6. Otherwise, the membrane 6 should be at least essentially impermeable to liquids, in particular water, and / or to aerosols or at least delay their passage. To achieve a slight swellability, the membrane 6 should have no or essentially no star hydrophilic groups, in particular no hydroxyl groups. For the purpose of slight swelling, however, the membrane 6 can have weakly hydrophilic groups, for example polyether groups.

The membrane 6 can consist of or comprise a plastic or a polymer material. Such a plastic or such a polymer can suitably e.g. B. be selected from the group of polyurethanes, polyether amides, polyester amides, polytetrafluoroethylene and / or cellulose-based polymers and derivatives of the aforementioned compounds. For example, the membrane 6 can be obtained as a reaction product from the reaction of an isocyanate, in particular a masked or blocked isocyanate, with an isocyanate-reactive crosslinker. For example, the membrane 6 can be a polyurethane-based membrane. Likewise, the membrane 6 can also be an expanded, optionally microporous membrane based on polytetrafluoroethylene. According to a special embodiment, the membrane 6 which may be present can be designed as a multilayer membrane laminate or as a multilayer membrane composite. This membrane laminate or membrane composite can consist of at least two, preferably at least three interconnected membrane layers or layers. For example, this membrane laminate or membrane composite can comprise a core layer based on a cellulose-based polymer and two outer layers connected to the core layer, in particular based on a polyurethane, a polyether amide and / or a polyester amide. The core layer may be based on a cellulose-based polymer as a 1 to 100 μm, in particular 5 to 50 μm, preferably 10 to 20 μm thick membrane, and the two may be bonded to the core layer. whose outer layers are each formed as a 1 to 100 μm, in particular 5 to 50 μm, preferably 5 to 10 μm thick membrane. This special configuration of the membrane 6 makes it possible to combine different membrane materials with different properties, in particular different water vapor permeability and / or barrier effects against chemical poisons, and thus to optimize the properties of the membrane 6. For example, cellulose and cellulose derivatives are excellent barrier materials, especially against chemical pollutants or toxins, such as. B. warfare agents (lost etc.), and are not attacked or dissolved by these poisons; on the other hand, polyurethane-based materials prevent migration or diffusion of the plasticizers that may be present in the cellulose layer and also dampen the crackling caused by the cellulose when it is worn. For this reason, it is preferred according to this particular embodiment that in the case of a membrane laminate or composite, the core layer is formed on the basis of a polymer based on cellulose, while the two outer layers of the membrane 6 are formed by polyurethane layers.

In particular in order to increase the stability or wear resistance, in particular the tear resistance, of the membrane 6 in the production process (for example when printing the membrane 6 with hot adhesive) and also when using or wearing it, the membrane 6 can be provided on an additional, Carrier layer, not shown in the figure, can be applied or laminated on.

To increase wearing comfort on the one hand and to achieve good wear resistance on the other hand, it is advantageous if the membrane 6 has a certain elasticity. In particular, it is advantageous if the membrane 6 can be stretched or stretched at least 10%, in particular at least 20%, preferably at least 30% or more, at least in one direction (based on the membrane 6). The layer structure 2 as a whole should also have a certain elasticity for the aforementioned purposes - in addition to good flexibility; compared to the membrane 6, however, the elasticity of the layer structure 2 as a whole is somewhat less, and in general the layer structure 2 as a whole is at least at least 5%, preferably at least 10%, very particularly preferably at least 15% or more, at least stretchable or stretchable in one direction.

According to a special embodiment, not shown in the figure, the membrane 6 can simultaneously represent the adhesive layer 7 for fastening the adsorption layer 5. In this case, the membrane 6 must be self-adhesive, in particular heat-adhesive. According to this particular embodiment, there is a saving in weight since an additional adhesive layer can be dispensed with.

By using so-called breathable membranes 6, d. H. In particular water vapor-permeable but liquid-impermeable membranes 6, in particular in the form of thin films, surprising improvements can be achieved for NBC protective clothing, in particular if the adsorbent filter layer 5, so to speak, behind the membrane 6, i.e. H. So in use or Wearing state, downstream of the membrane 6, is arranged. Such membranes 6 can, for. B. are based on different constructions, two of which are mentioned in the following without limitation:

2. microporous, hydrophobic membranes, in particular made of microporous PTFE, polyurethanes or polyolefins (these membranes are generally only liquid-tight to a limited extent but are permeable to air).

By using membranes from group 1, the flow rates of the adsorbent active carbon filter layers 5 can be reduced or, under certain circumstances, even reduced to zero. The adsorptive filter layers 5 can therefore be reduced in thickness and mass by up to 90% depending on the diffusion rate of pollutants through the membrane 6. In addition, the protective suits obtained are particle-tight, so that they can also be used to protect against B-arms and radioactive particles. The use of group 2 membranes means that the weight of the adsorptive filter layers 5 cannot be reduced due to the air flow. wrestlers. In this case, however, the membranes 6 serve as effective particle filters for aerosols, B-arms and radioactive particles.

As far as the adsorption layer 5 of the adsorption material 1 according to the invention is concerned, it is generally discontinuous, i. H. the adsorption layer 5 generally comprises discrete adsorption particles which adsorb chemical poisons (e.g. adsorbents based on activated carbon), which are fixed, for example, by means of an adhesive on the membrane 6 or on the cover layers 7, 8 or on an additional carrier etc. could be. The adsorption material of the adsorption layer 5 can in particular be an adsorption material containing or consisting of activated carbon, for example a material based on activated carbon in the form of activated carbon particles and or activated carbon fibers.

Because if 5 materials containing activated carbon are used as the adsorption material for the formation of the adsorption layer, the already high level of wearing comfort can be increased even further, because the activated carbon serves as an intermediate moisture or water reservoir (for example for sweat) and Can "buffer" moisture or water, so to speak. When using, for example, activated carbon beads as Adsoφtionsmaterial for the Adsoφtionsschicht 5 conditions of up to about 250 g / m 2 or more are common, so that, for. B. in the event of an outbreak of sweat, about 40 g / m 2 of moisture can be stored, which in the case of a breathable carrier or outer layer 3 can then be released into the environment again.

The adsorption layer 5 can advantageously be designed as an adsorption surface filter, in particular on the basis of an adsorbent fixed to a preferably flat, in particular textile carrier.

According to an embodiment of the present invention, the adsorption layer 5 comprises discrete activated carbon particles, preferably in the form of granules ("granular carbon") or ("spherical carbon"). In this case, the average diameter of the activated carbon particles is less than 1.0 mm, in particular less than 0.5 mm, preferably less than 0.4 mm, preferably less than 0.35 mm; however, the average diameter of the activated carbon particles is at least 0.1 mm. In this embodiment, the activated carbon particles in generally used in an amount of 5 to 50 g / m 2 , preferably 20 to 300 g / m 2 , preferably 25 to 250 g / m 2 , particularly preferably 50 to 100 g / m 2 . Suitable activated carbon particles have inner surfaces (BET) of at least 800 m 2 / g, in particular of at least 900 m 2 / g, preferably of at least 1,000 m 2 / g, preferably in the range from 800 to 1,500 m 2 / g. Granular coal, especially spherical coal, has the decisive advantage that it is extremely abrasion-resistant and very hard, which is of great importance with regard to the wear properties. Preferably, the bursting pressure for a single activated carbon particle, in particular activated carbon granules or spheres, is generally at least about 5 newtons, in particular at least about 10 newtons, and can reach up to about 20 newtons.

According to an alternative embodiment, the adsorption layer 5 can comprise activated carbon fibers, in particular in the form of activated carbon fiber surfaces, as the adsorbent. Such activated carbon fiber fabrics can have, for example, a basis weight of 20 to 200 g / m 2 , in particular 30 to 150 g / m 2 , preferably 15 to 120 g / m 2 . These activated carbon fiber structures can be, for example, activated carbon fiber fabrics, knitted fabrics, scrims or composite materials (for example based on carbonized and activated cellulose and / or carbonized and activated acrylonitriles).

Likewise, it is also possible to combine 5 activated carbon particles and activated carbon fibers with one another as the adsorbent of the adsorption layer. Activated carbon particles have the advantage of a higher adsorption capacity, while activated carbon fibers have better adsorption kinetics.

To increase the adsorption efficiency or adsorption performance, there is also the possibility of impregnating the adsorbent of the adsorption layer 5, in particular the active carbon particles and / or the activated carbon fibers, with at least one catalyst. Suitable catalysts according to the invention are, for example, enzymes and / or metal ions, preferably copper, silver, cadmium, platinum, palladium, zinc and / or mercury ions. The amount of catalyst can vary within wide limits; in general it is 0.05 to 12% by weight, preferably 1 to 10% by weight, particularly preferably 2 to 8% by weight, based on the weight of the adsorption layer 5. For an efficient adsorption performance, it is preferred if at least 50%, in particular at least 60%, preferably at least 70%, of the adsorption layer 5 or the adsorbents of the adsorption layer 5 are freely accessible for the poisons or warfare agents to be adsorbed, ie in particular not with adhesive are covered. This is done in that the amount and the type, in particular the viscosity, of the adhesive with which the adsorbents are optionally fixed are designed such that the adsorbents of the adsorption layer 5 are not completely pressed or sink into the adhesive.

The adsorption material 1 according to the invention offers efficient protection against chemical poisons, in particular chemical warfare agents, while at the same time being very comfortable to wear, in particular good breathability, in the case of NBC protective suits. On the basis of these properties, the adsorption material 1 according to the invention is particularly suitable for military or ABC use (for example in the form of an ABC protective suit).

As a result of the high efficiency of the protective function of the adsorption layer 5, which is increased by the use of the membrane 6 according to the invention, it is also possible to use breathable carrier or outer materials 3, e.g. B. Textiles, so that the wearing comfort can be increased in this way without the wearer of a corresponding protective suit being exposed to an increased risk from the use of a breathable carrier or outer material 3.

Due to the high flexibility and good flexibility of the individual layers 3, 4, 5, 6, 7 and 8 or the layer structure 2 overall, not only is good wearing comfort achieved, but also good wear resistance of the adsorption material 1 according to the invention.

The inventive design of the adsorption material 1 according to the present invention achieves an excellent barrier effect against chemical warfare agents. The barrier effect of the adsorption material 1 or the membrane 6 against chemical warfare agents, in particular bis- [2-chloroethyl] sulfide (also synonymously referred to as mustard gas, mustard or yellow cross), measured according to CRDEC-SP-84010, method 2.2, carries at most 4 μg / cm 2 per 24 h, in particular at most 3.5 μg / cm per

24 h, preferably at most 3.0 μg / cm per 24 h, particularly preferably at most 2.5 μg / cm 2 per 24 h, with a thickness of the membrane 6 of 50 μm.

The adsorption material according to the invention can be produced in a manner known per se. This is well known to the person skilled in the art of producing adsorption materials, so that no further details need be given here.

As described above, the adsorption material according to the invention is suitable for producing protective materials of all kinds, in particular protective suits, protective gloves, protective shoes and protective covers. The present invention thus also relates to protective materials of this type which are produced using the adsorption material according to the invention.

As previously mentioned, in the protective materials according to the invention, when the adsorption material is in use, the carrier layer is generally arranged on the outside, in particular facing a source of chemical toxins which releases toxins. The protective materials are preferably protective suits, in particular NBC protective suits, the carrier layer being arranged on the outside in the state of use, in particular facing a source of chemical toxins which releases toxins or being arranged on the side facing away from the body.

In the following concrete examples are described.

1. Construction of a complete protective suit Details of the design: The following layers may be present in an ABC protective suit with membranes: A: outer fabric B: membrane C: cover (if the selected adsorptive layer requires this) D: adsorbent layer E: lining fabric These layers can be connected by lamination ("+") or unconnected or loosely one above the other ("/"). The following construction options are e.g. B. reasonable and technically feasible:

1. A + B + C + D + E 2. A + B / C + D + E

3. A / B + D + E

4. A B + C + D + E

5. Ä + B + D + C / E

6. A + B / D + E 7. A + B + D + E

8. A B + D + C / E

9. A / B + D / E

10. A + B / C + D / E

11. A + B / C + D + C / E.

With constructions 2, 3, 4, 6, 7, 9, 10, 11, the seams of the membrane laminate can be sealed liquid-tight with hot-melt adhesive tapes. However, by using the adsorbent filter material, this is not necessary in order to obtain the required ABC protective effect.

The zippers are z. B. with external or internal double covers (z. B. one on the right and left side of the zipper), consisting of membrane laminate and filter with a high amount of activated carbon. In a special version, in which the seams of the Membra aminate are not welded watertight, the seams in the membrane laminate and in the adsorptive lining, for example, are arranged so that they do not lie directly one above the other. This further increases the security of the protective effect.

2. Combination of membrane protective suit with adsorbent undergarment In a further construction possibility, membrane functional layer and adsorbent functional layer are separated from one another in different positions of the loading clothes separately. The adsoφtive layer is worn as an undergarment in the form of an underwear or in the form of underwear.

The membrane can be installed in an outer protective jacket, and there are the following possible combinations (with the same symbols as before):

1. A + B + E

2. A + B / E

3. A / B + E 4. A / B + C / E.

The seams piercing the membrane are sealed liquid-tight using a seam sealing tape.

3. Removable adsorptive functional cracking

The adsoφtive functional layer can be made removable, for. B. if the protective clothing is also to be used for other purposes, or a low risk potential can be assumed. The membrane construction corresponds to the construction options under no. 2. The adsoφtive layer has z. B. the structure C + D + E (with the same symbols as before) and z. B. by means of zippers, Velcro, push buttons and the like with the membrane layer.

As a rule, it is sufficient for the ABC protective suits that conventional closure systems are used. In an embodiment for increased protection, z. B. an approximately 10 cm wide strip of adsorbent filter material can be used in a mass that corresponds to systems without the use of membranes. This further reduces or prevents the penetration of warfare agents through openings.

Further refinements, modifications and variations of the present invention are readily recognizable and realizable for the person skilled in the art on reading the description, without thereby leaving the scope of the present invention.

Claims

Claims: 1. Breathable adsorption material (1) with a protective function against chemical poisons, in particular chemical warfare agents, with a multilayered layer structure (2), the layer structure (2) being assigned at least one, in particular flat, support layer (3) and one of the support layer (3) has a barrier layer (4) which prevents or at least retards the passage of chemical poisons, the barrier layer (4) on the one hand having at least one adsorption layer (5) based on an adsorbent adsorbing chemical poisons, in particular based on
Activated carbon, and on the other hand at least one at least essentially water and air impermeable but water vapor permeable,

the
The passage of chemical poisons is delayed or chemical
Poisons has at least essentially impermeable membrane (6).

2. Adsorption material according to claim 1, characterized in that in
Condition of use of the adsorption material (1), the carrier layer (3) is arranged on the outside, in particular facing a source of chemical toxins releasing toxins, and the barrier layer (4) is arranged on the inside, in particular, releasing a chemical poisons
Source of pollutant is turned away.

3. Adsorption material according to claim 1 or 2, characterized in that the adsorption material (1) also has at least one in particular flat, the adsorption layer (5) associated cover layer (7), in particular wherein the cover layer (7) to cover the
Barrier layer (4), in particular the adsorption layer (5), serves and / or in particular wherein the cover layer (7) simultaneously serves as a carrier for the adsorbent of the adsorption layer (5) and / or for the membrane (6) and / or in particular wherein the cover layer (7) is part of the barrier layer (4).

4. Adsorbent material according to one or more of the preceding claims, characterized in that the adsorbent material (1) also has at least one additional, in particular flat additional cover layer (8), in particular in the state of use of the
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Adsorption material (1) the additional cover layer (8) is arranged on the inside, in particular facing away from a pollutant source that releases chemical toxins and is arranged opposite the carrier layer (3) and / or in particular wherein the additional cover layer (8) and the carrier layer (3 ) the two outer layers (3, 8) of the adsorption material (1)

form and / or in particular wherein the additional covering layer (8) forms an inner lining when the adsorption material (1) is in use.

5. Adsorption material according to one or more of the preceding claims, characterized in that the individual layers (3, 4, 5, 6,
7,8) of the layer structure (2) connected to each other. are or, at least in part, unconnected one above the other. and / or that the individual layers (3, 4, 5, 6, 7, 8) of the layer structure (2) form a composite.

6. Adsorption material according to one or more of the preceding claims, characterized in that the individual layers (3, 4, 5, 6, 7, 8) of the layer structure (2) in the adsorption material (1) can be arranged as follows, the individual layers (3, 4, 5, 6, 7, 8) can be connected to one another, which is represented by the symbol "+", or can be unconnected one above the other, which is represented by the symbol "/":

7. Adsorption material according to one or more of the preceding claims, characterized in that the carrier layer (3) is oleophobic and / or hydrophobic, in particular by a special impregnation.

8. Adsorption material according to one or more of the preceding claims, characterized in that the membrane (6) is a continuous, in particular closed or at most microporous membrane and / or that the thickness of the membrane (6) is 1 to 500 µm, in particular
1 to 250 µm, preferably 1 to 100 µm, preferably 1 to 50 µm, particularly preferably from 2.5 to 30 µm, very particularly preferably from 5 to 25 µm.

9. Adsorption material according to one or more of the preceding claims, characterized in that the membrane (6) at 25 C and at a thickness of 50 µm has a water vapor permeability of at least 12, 51 / mu per 24 h, in particular at least 17 .5 1 / m2 per 24 h, preferably at least 201 / mu per 24 h or more, and / or that the adsorbent material (1) at 25 C and with a thickness of
Membrane (6) of 50 µm has a water vapor permeability of at least 10 l / m2 per 24 h, in particular at least 15 l / m2 per 24 h, preferably at least 20 1 / m2 per 24 h.

10. Adsorption material according to one or more of the preceding claims, characterized in that the membrane (6) has a water vapor transmission resistance Ret under stationary conditions, measured according to DIN EN 31 092: 1993 (February 1994) and international standard
ISO 11 092, at 35 C of at most 25 (m2 # Pascal) / watt, in particular at most 20 (m2-Pascal) / watt, preferably at most 13 (m2.

Pascal) * / Watt, at a thickness of 50 µm and / or that the adsorbent material (1) has a water vapor resistance
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Ret under stationary conditions, measured according to DIN EN 31 092: 1993 (February 1994) and international standard ISO 11 092, at 35 C of at most 30 (m2 Pascal) / watt, in particular at most 25 (m2 pascal) / watt, preferably at most 20 (m2-Pascal) / watt, with one
Thickness of the membrane (6) from 50 am.

11. Adsorption material according to one or more of the preceding claims, characterized in that the membrane (6) is designed as a multilayer membrane laminate and / or as a multilayer membrane composite, in particular wherein the membrane laminate and / or the membrane composite there is at least two, preferably at least three interconnected layers or layers.

12. Adsorption material according to claim 11, characterized in that the membrane laminate or the membrane composite has a core layer
Basis of a polymer based on cellulose and two outer layers connected to the core layer, in particular based on a polyurethane, a polyether amide and / or a polyester amide, in particular wherein the core layer based on a polymer based on cellulose as 1 to 100 around, in particular 5 to 50 .mu.m, preferably 10 to 20 .mu.m thick membrane and / or in particular wherein the two outer ones connected to the core layer
Layers each as 1 to 100 μm, in particular 5 to 50 μm,

preferably 5 to 10, can be formed around thick membrane.

13. Adsorption material according to one or more of the preceding claims, characterized in that the adsorption layer (5) is discontinuous and / or that the adsorption layer (5) discrete adsorbent particles adsorbing chemical poisons, in particular based on activated carbon , comprises and / or that the adsorbent
Adsorption layer (5) is an adsorbent containing or consisting of activated carbon.

14. Adsorption material according to one or more of the preceding claims, characterized in that the adsorption layer (5) as one
Adsorption surface filters, in particular based on an adsorbent fixed to a preferably flat, in particular textile carrier,
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is formed and / or that the adsorption layer (5) is a chemical
Poisons adsorbing adsorbent, in particular based on activated carbon, preferably in the form of activated carbon particles and / or activated carbon fibers, wherein the adsorbent is preferably attached to a carrier, in particular a textile carrier.

15. Adsorption material according to one or more of the preceding claims, characterized in that the adsorption material (1) and / or the membrane (6) have a barrier effect against chemical
Warfare agents, in particular bis [2-chloroethyl] sulfide (mustard gas, mustard, yellow cross), measured according to CRDEC-SP-84010, method 2.2, of a maximum of 4 µg / cm2 per 24 h, in particular a maximum of 3.5 µg i cm2 per 24 h, preferably at most 3.0 μg / 'cm per 24 h, particularly preferably at most 2.5 Fg / cm 2 per 24 h, with a thickness of the membrane (6) of
50 mm.

16. Breathable adsorbent material (1) with a protective function against chemical poisons, in particular chemical warfare agents, with a multilayered layer structure (2), the layer structure (2) being assigned at least one, in particular flat, support layer (3) and one of the support layer (3) Has passage of chemical poisons preventing or at least retarding barrier layer (4), the barrier layer (4) on the one hand at least one adsorption layer (5) based on a chemical adsorbing adsorbent, in particular based on
Activated carbon, and on the other hand at least one which is at least essentially water and air impermeable but water vapor permeable
The passage of chemical poisons is delayed or chemical
Poisons has at least essentially impermeable membrane (6),

wherein the adsorbent material (1) and / or the membrane (6) a
Barrier effect against chemical warfare agents, in particular
Bis [2-chloroethyl] sulfide, of at most 4 µg / cm2 per 24 h with a membrane (6) thickness of 50 µm.

17. Breathable adsorption material (1) with a protective function against chemical poisons, in particular chemical warfare agents, with a multilayered layer structure (2), the layer structure (2) having at least one, in particular flat, support layer (3) and one of the support layer
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(3) has an associated barrier layer (4) which prevents or at least delays the passage of chemical poisons, the barrier layer (4) on the one hand at least one adsorption layer (5) based on an adsorbent which adsorbs chemical poisons, in particular based on
Activated carbon, and on the other hand at least one which is at least essentially water and air impermeable but water vapor permeable
The passage of chemical poisons is delayed or chemical
Poisons at least substantially impermeable membrane (6)

has, the adsorption material (1) at 25 C and with a thickness of the membrane (6) of 50 pm having a water vapor permeability of at least 10 l / m2 per 24 h.

18. Breathable adsorption material (1) with a protective function against chemical poisons, in particular chemical warfare agents, with a multilayered layer structure (2), the layer structure (2) being assigned at least one, in particular flat, support layer (3) and one of the support layer (3) Has passage of chemical poisons preventing or at least retarding barrier layer (4), the barrier layer (4) on the one hand at least one adsorption layer (5) based on a chemical adsorbing adsorbent, in particular based on
Activated carbon, and on the other hand at least one which is at least essentially water and air impermeable but water vapor permeable
The passage of chemical poisons is delayed or chemical
Poisons has at least essentially impermeable membrane (6),

the adsorption material (1) having a water vapor volume resistance Ret under stationary conditions at 35 C of at most 30 (m2 Pascal) / watt with a thickness of the membrane (6) of 50 gm.

19. Protective materials, in particular protective suits, protective gloves,
Protective shoes and protective covers manufactured using an adsorption material (1) according to one of the preceding claims and / or comprising an adsorption material (1) according to one of the preceding claims.
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20. Protective materials according to claim 19, characterized in that in
Condition of use of the adsorption material (1), the carrier layer (3) is arranged on the outside, in particular facing a source of chemical toxins releasing toxins and / or that it is in the
Protective materials are protective suits, in particular NBC protective suits, the carrier layer (3) being arranged on the outside in the state of use, in particular facing a pollutant source which releases chemical toxins and being arranged on the side facing away from the body.

21. Use of an adsorption material (1) according to one of the preceding claims for the production of protective materials of all kinds, in particular protective suits, protective gloves, protective shoes and
Protective covers, preferably for ABC use, in particular where the carrier layer (3) is arranged on the outside when the adsorption material (1) is in use and / or in particular where
Condition of use of the adsorption material (1) the support layer (3) faces a source of chemical toxins which releases toxins.